More than 80 years have passed since the discovery of paramagnetic resonance by E.K. Zavoisky in 1944, but EPR-based methods continue to develop and are widely used in various fields of science and industrial research. Later, in 1946, American scientists E.M. Purcell and F. Bloch discovered the phenomenon of nuclear magnetic resonance, which also became a powerful tool for studying the properties of compounds. This special issue welcomes articles that demonstrate both achievements and new examples of the successful applications of these methods in chemistry and biology, studies of strongly correlated electron structures, low-dimensional and nano-systems, defects and spin qubits and other systems.

This special issue is devoted to Professor Brian M. Hoffman, Northwestern University, on the occasion of his 85th birthday. It aims to recognize the many contributions of Prof. Hoffman to EPR spectroscopy in bioinorganic chemistry and inorganic chemistry in general. Topics covered include, but are not limited to: advanced experimental or theoretical techniques in EPR, applications of EPR and related techniques to biochemistry, metallo- and radical enzymes, and structural biology applications in materials science, as well as spin chemistry and relevant applications, for example in molecular magnetism, high-spin organic, or stable radical chemistry.